I have seen this wonderful new tool:MathJaxWhere they show some sort of embedded HTML/CSS equation that can be copy and pasted.

I found some online applications that allow to visually build an equation and export it as MathML. But when I copy the MathML code into a post it doesn't show the equation.

The way that I am handling equation now is just by giving the user a link to an online generator that creates a picture of the equation. But the users sometimes forget to insert the LaTeX code... So this MathJax or MathML looks more like the solution I want.